from linecache import clearcache

print('hello')
print('你好')
print(1+2-4+5*2)
print((89.0+67.5+69.5+99)/4)
avg = (67.9+89.0+12.9+32.2)/4
num = (67.5-avg)**2 + (89.0-avg)**2 + (12.9-avg)**2 + (32.2-avg)**2
print(num/3)
result = num /3
print(result)
print(2/3)

a = 10
b = a
print('b = ',b)
c = a**2
print('c = ',c)
